CN114322194B - Control processing method and device for air conditioner tail end device and air conditioning equipment - Google Patents
Control processing method and device for air conditioner tail end device and air conditioning equipment Download PDFInfo
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- CN114322194B CN114322194B CN202111553401.6A CN202111553401A CN114322194B CN 114322194 B CN114322194 B CN 114322194B CN 202111553401 A CN202111553401 A CN 202111553401A CN 114322194 B CN114322194 B CN 114322194B
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The control processing method comprises the steps of acquiring the actual current value of an inverter module circuit of a fan coil when the fan coil runs; comparing and calculating the actual current value with a preset current protection value, and correspondingly generating an indication signal according to different calculation results; and performing feedback control on the inverter module circuit according to the indication signal. This application helps realizing the protection to fan coil's contravariant module circuit, guarantees air conditioning unit's normal operating.
Description
Technical Field
The application belongs to the technical field of air conditioners, and particularly relates to a control processing method and device for an air conditioner tail end device and air conditioning equipment.
Background
In the running process of an internal machine of a commercial wind disc (fan coil), an inverter module circuit works, but a main control circuit cannot know the actual working condition of the inverter module circuit, when the circuit reaches the maximum power value, the main control circuit possibly continues to issue commands to enable the power of the circuit to continue to rise, so that the circuit is burnt due to current overload, and the normal running of an air conditioning unit is seriously influenced.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
In order to overcome the problems in the related art at least to a certain extent, the application provides a control processing method and device of a fan coil and an air conditioning unit, which are beneficial to realizing the protection of an inverter module circuit of the fan coil and ensuring the normal operation of an air conditioning unit.
In order to achieve the purpose, the following technical scheme is adopted in the application:
in a first aspect of the present invention,
the application provides a control processing method of an air conditioner terminal device, which comprises the following steps:
when the fan coil runs, acquiring the actual current value of an inverter module circuit of the fan coil;
comparing and calculating the actual current value with a preset current protection value, and correspondingly generating an indication signal according to different calculation results;
and performing feedback control on the inverter module circuit according to the indication signal.
Optionally, the comparing and calculating the actual current value with a preset current protection value, and generating an indication signal according to different calculation results correspondingly includes:
and when the ratio of the actual current value to the current protection value is calculated to be larger than or equal to a first threshold value, correspondingly generating a first signal for indicating stopping issuing the working instruction.
Optionally, the comparing and calculating the actual current value with a preset current protection value, and generating an indication signal according to different calculation results, further includes:
and when the ratio of the actual current value to the current protection value is calculated to be greater than or equal to a second threshold value and smaller than a first threshold value, correspondingly generating a second signal indicating an operation warning.
Optionally, the comparing and calculating the actual current value with a preset current protection value, and generating an indication signal according to different calculation results, further includes:
and when the ratio of the actual current value to the current protection value is smaller than the second threshold value, correspondingly generating a third signal indicating safe operation.
Optionally, the obtaining an actual current value of the inverter module circuit of the fan coil includes:
acquiring environmental temperature data of an operating environment where the inverter module circuit is located in real time, and acquiring static pressure data of an outlet of a fan coil fan to which the inverter module circuit belongs in real time;
and correcting the operating current instantaneous value of the inverter module circuit based on the environment temperature data and the static pressure data, and taking the corrected current value as the actual current value.
Optionally, the operating current transient is determined based on:
acquiring an instantaneous voltage value on a sampling resistor in the inverter module circuit at a preset sampling frequency, and calculating and determining an operating current instantaneous value according to the instantaneous voltage value and a sampling resistor resistance value;
the preset sampling frequency is far greater than the operating current frequency of the inverter module circuit.
Optionally, the modifying an operating current instantaneous value of an inverter module circuit based on the environmental temperature data and the static pressure data, and taking a modified current value as the actual current value includes:
and calculating a current effective value based on the preset sampling frequency and the running current instantaneous value, correcting the current effective value by utilizing a first function corresponding relation constructed in advance according to the environment temperature data and the static pressure data, and taking the corrected current value as the actual current value.
Optionally, the modifying an operating current instantaneous value of an inverter module circuit based on the ambient temperature data and the static pressure data, and taking a modified current value as the actual current value includes:
and correcting the running current instantaneous value by utilizing a pre-constructed second function corresponding relation according to the preset sampling frequency, the environment temperature data and the static pressure data, and taking the corrected current value as the actual current value.
In a second aspect of the present invention,
the application provides a control processing apparatus of air conditioner end device, the device includes:
the acquisition module is used for acquiring the actual current value of an inverter module circuit of the fan coil when the fan coil runs;
the signal generation module is used for comparing and calculating the actual current value with a preset current protection value and correspondingly generating an indication signal according to different calculation results;
and the control processing module is used for carrying out feedback control on the inverter module circuit according to the indication signal.
In a third aspect,
the present application provides an air conditioning apparatus, comprising,
a memory having an executable program stored thereon;
a processor for executing the executable program in the memory to implement the steps of any of the above methods.
This application adopts above technical scheme, possesses following beneficial effect at least:
according to the technical scheme, the actual current value of the inverter module circuit is obtained, the actual current value is compared with the set protection current value, the indication signal is correspondingly generated, feedback control is carried out on the inverter module circuit based on the indication signal, the possibility that the inverter module circuit of the fan coil is burnt is reduced by the mode, and normal operation of the air conditioning unit is effectively guaranteed.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the technology or prior art of the present application and are incorporated in and constitute a part of this specification. The drawings expressing the embodiments of the present application are used for explaining the technical solutions of the present application, and should not be construed as limiting the technical solutions of the present application.
Fig. 1 is a schematic flowchart of a control processing method of an air conditioner terminal device according to an embodiment of the present disclosure;
fig. 2 is a first schematic diagram illustrating a control principle of a control processing method of an air conditioner terminal device according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram illustrating a control principle of a control processing method of an air conditioner terminal device according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a control processing device of an air conditioning end device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.
As described in the background art, in the operation process of the commercial air disc internal unit, the inverter module circuit works, but the main control circuit cannot know the actual working condition of the inverter module circuit, and when the inverter module circuit reaches the maximum power value, the main control circuit may still continue to send a command to continue the power rise of the inverter module circuit, so that the inverter module circuit is burnt due to current overload, and the normal operation of the air conditioning unit is seriously influenced.
In view of the above, the present application provides a control processing method for an air conditioning terminal device, which is helpful for protecting an inverter module circuit of a fan coil and ensuring normal operation of an air conditioning unit.
In one embodiment, as shown in fig. 1, the control processing method of the fan coil includes the following steps:
step S110, acquiring an actual current value of an inverter module circuit of the fan coil when the fan coil runs;
step S120, comparing and calculating the actual current value with a preset current protection value, and correspondingly generating an indication signal according to different calculation results;
and step S130, performing feedback control on the inverter module circuit according to the indication signal.
For example, in practical application, when the actual current value approaches the current protection value of the inverter module circuit, a corresponding indication signal is correspondingly generated, and according to the circuit working condition indicated by the indication signal, the main control circuit performs feedback control and stops issuing commands continuously to enable the circuit power to continue to rise, so that the situation that the circuit is burnt due to current overload is avoided.
According to the technical scheme, the actual current value of the inverter module circuit is obtained, the actual current value is compared with the set protection current value, the indication signal is correspondingly generated, feedback control is carried out on the inverter module circuit based on the indication signal, the possibility that the inverter module circuit of the fan coil is burnt is reduced by the mode, and normal operation of the air conditioning unit is effectively guaranteed.
In order to facilitate understanding of the technical solutions of the present application, the technical solutions of the present application are further described below with another embodiment.
In this embodiment, the control processing method for the air conditioner terminal device proposed by the present application includes the following steps,
step S210, firstly, when the fan coil runs, acquiring the actual current value of an inverter module circuit of the fan coil;
specifically, as shown in fig. 2, in step S210 of this embodiment, the ambient temperature data of the operating environment where the inverter module circuit is located is acquired in real time (the ambient temperature acquisition in fig. 2), and the static pressure data of the fan coil outlet to which the inverter module circuit belongs is acquired in real time (the static pressure acquisition in fig. 2);
the instantaneous value of the operating current of the inverter module circuit (obtained based on the instantaneous current acquisition shown in fig. 2) is corrected based on the ambient temperature data and the static pressure data, and the corrected current value is taken as an actual current value, which is also referred to as an I value in this application.
The protection essence of the inverter module circuit is to ensure that the operation working condition of the inverter module circuit does not exceed the limit power state so as to avoid the damage of the inverter module circuit, and the current condition of the inverter module circuit can be used for indicating the power state of the inverter module circuit; the applicant finds that, in the application scenario of the present application, the timeliness and accuracy of protection are considered comprehensively, and the current instantaneous value can be corrected based on the operating current instantaneous value of the inverter module circuit and based on the ambient temperature condition and the static pressure condition of the fan outlet, so as to obtain the actual current value (referred to as I value in the present application) capable of better representing the current condition of the inverter module circuit.
First, a method for acquiring an instantaneous operating current value is described, in this embodiment, a sampling resistor is disposed in a sampling loop in an inverter module circuit, an instantaneous voltage value across the sampling resistor in the inverter module circuit is acquired at a preset sampling frequency, and an instantaneous operating current value (based on I = U/R) is determined by calculation according to the instantaneous voltage value and a resistance value of the sampling resistor;
it should be noted that, in the above process, the preset sampling frequency is much higher than the operating current frequency of the inverter module circuit, and the higher the preset sampling frequency is, the better the preset sampling frequency is, so as to ensure that the acquired value is closer to reality.
Regarding the collection of the ambient temperature data and the static pressure data, generally, a temperature collecting device is arranged beside a device (such as a heat dissipation plate and the like which can cause great influence on the temperature) which generates heat greatly in a circuit to obtain the ambient temperature data, and in the actually installed equipment, a static pressure collecting device is arranged at an air outlet of a fan to obtain the static pressure data.
Next, a method of obtaining an actual current value in the present application will be described.
In this embodiment, the instantaneous value of the operating current of the inverter module circuit is corrected based on the ambient temperature data and the static pressure data, and the corrected current value is used as the actual current value, specifically:
and calculating a current effective value based on a preset sampling frequency and the running current instantaneous value, correcting the current effective value by utilizing a first function corresponding relation constructed in advance according to the environment temperature data and the static pressure data, and taking the corrected current value as an actual current value.
Or as another specific implementation manner, the operating current instantaneous value may be corrected by using a second function corresponding relationship that is constructed in advance according to a preset sampling frequency, environmental temperature data, and static pressure data, and the corrected current value may be used as an actual current value.
It is easy to understand that the first function corresponding relation and the second function corresponding relation related to the above process are both corresponding relations which can be constructed based on the fitting of engineering empirical data; the above-described conversion processing of the I value may be implemented in the data processor based on a specific program, and the form of implementation of the program is not exclusive.
In this embodiment, after obtaining the I value (actual current value), step S220 is performed to compare the I value with the current protection value of the inverter module circuit, and generate the indication signal according to different calculation results, or generate the indication signal according to different calculation results based on a preset rule;
specifically, in this embodiment, the preset rule includes:
when the ratio of the actual current value to the current protection value is smaller than a second threshold value, correspondingly generating a third signal indicating safe operation; and
when the ratio of the actual current value to the current protection value is calculated to be larger than or equal to a second threshold value and smaller than a first threshold value, a second signal indicating an operation warning is correspondingly generated; and
and when the ratio of the actual current value to the current protection value is calculated to be larger than or equal to a first threshold value, correspondingly generating a first signal for indicating stopping issuing the working instruction.
It is easily understood that, for protection, none of the above thresholds is greater than 1, and the specific values of the thresholds can be set according to the actual working conditions, generally speaking, the second threshold is in the range of 70% to 80%, the first threshold is in the range of 80% to 90%, as shown in fig. 3, in this embodiment, the first threshold is 80%, and the second threshold is 70%.
That is, in this embodiment, when the I value is less than 70% of the set protection current value, it indicates that the I value in the inverter module circuit is within the tolerable range of the circuit, and the inverter module circuit is normally operating at this time;
once the value I reaches the range of 70% -80% of the protection current value, a signal for operation warning is generated, and the power of the inverter module circuit is reminded to reach the highest value (corresponding to the feedback to the main control circuit in fig. 3);
when the value I reaches the range of more than 80% of the protection current value, a signal (or a limit signal) for stopping issuing the work instruction is generated to indicate that the power of the inverter module circuit reaches the maximum value, and then a command for continuing to work can be issued according to the signal, so that the inverter module circuit can work at the highest bearable power, and the inverter module circuit cannot be damaged due to excessive overcurrent.
In addition, in order to ensure the stability and reliability of the generation of the indication signal, a specifically configured hardware circuit may be used to implement the process, for example, a cascade circuit is provided to implement the comparison process, the signal indicating the value I calculated is input to a first comparison circuit of the cascade circuit for comparison, and when the value is smaller than a second threshold value, a safety signal is fed back to the main control circuit; when the signal is larger than or equal to a second threshold value, the signal is transmitted to a second comparison circuit to be compared, and the like.
And finally, performing step S230, performing feedback control on the inverter module circuit according to the indication signal.
Specifically, in this embodiment, when the indication signal is the first signal, it indicates that the limit working state is reached, as shown in fig. 3, the main control circuit stops issuing the working instruction to the inverter module circuit (i.e., the control circuit does not continuously increase the power); when the indication signal is the second signal or the third signal, the main control circuit does not need to change the current control strategy of the inverter module circuit based on the signal.
According to the technical scheme, the actual current value (I value) can be calculated by collecting the operating current instantaneous value, the environment temperature data and the static pressure data of the inverter module circuit, so that the operating condition of the circuit can be accurately and timely indicated; and then, by comparing the current value with the set protection current value of the inverter module circuit, a feedback signal is sent to the main control circuit in time, so that the possibility that the inverter module circuit is burnt can be effectively reduced.
In addition, in the related art, in order to prevent the inverter module circuit from being damaged due to the current overload, an overcurrent protection module is generally used to protect the inverter module circuit. Based on the material characteristics of the overcurrent protection module, when the overcurrent starting value (the protection current value of the inverter module circuit) is reached, the power supply of the inverter module circuit is cut off to realize protection. Compared with the technical scheme of the application, the implementation mode can cause the fan coil to be suddenly stopped, and further easily causes related problems, such as influence on the service life of components and the like.
Fig. 4 is a schematic structural diagram of a control processing device of an air conditioning end device according to an embodiment of the present application, and as shown in fig. 4, the control processing device 300 includes:
the acquiring module 301 is used for acquiring the actual current value of an inverter module circuit of the fan coil when the fan coil runs;
the signal generating module 302 is configured to compare the actual current value with a preset current protection value, and generate an indication signal according to different calculation results;
and the control processing module 303 is configured to perform feedback control on the inverter module circuit according to the indication signal.
With regard to the control processing device 300 in the above-described related embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
In one embodiment, the present application also provides an air conditioning apparatus, comprising,
the memory has an executable program stored thereon;
a processor for executing the executable program in the memory to implement the steps of the above method.
With respect to the air conditioning apparatus in the above embodiments, the specific manner of executing the program in the memory by the processor thereof has been described in detail in the embodiments related to the method, and will not be elaborated herein.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps in the process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (9)
1. A control processing method of an air conditioner terminal device is characterized by comprising the following steps:
when the fan coil runs, acquiring the actual current value of an inverter module circuit of the fan coil;
comparing and calculating the actual current value with a preset current protection value, and correspondingly generating an indication signal according to different calculation results;
performing feedback control on the inversion module circuit according to the indication signal;
wherein the content of the first and second substances,
the actual current value of the inversion module circuit of the fan coil is obtained, and the method comprises the following steps:
acquiring environmental temperature data of an operating environment where the inverter module circuit is located in real time, and acquiring static pressure data of an outlet of a fan coil fan to which the inverter module circuit belongs in real time;
and correcting the operating current instantaneous value of the inverter module circuit based on the environment temperature data and the static pressure data, and taking the corrected current value as the actual current value.
2. The control processing method according to claim 1, wherein the comparing and calculating the actual current value with a preset current protection value and generating an indication signal according to different calculation results correspondingly comprises:
and when the ratio of the actual current value to the current protection value is calculated to be larger than or equal to a first threshold value, correspondingly generating a first signal for indicating stopping issuing the working instruction.
3. The control processing method according to claim 2, wherein the comparing and calculating the actual current value with a preset current protection value and generating an indication signal according to different calculation results correspondingly further comprises:
and when the ratio of the actual current value to the current protection value is calculated to be greater than or equal to a second threshold value and smaller than a first threshold value, correspondingly generating a second signal indicating an operation warning.
4. The control processing method according to claim 3, wherein the comparing and calculating the actual current value with a preset current protection value and generating an indication signal according to different calculation results correspondingly further comprises:
and when the ratio of the actual current value to the current protection value is smaller than the second threshold value, correspondingly generating a third signal indicating safe operation.
5. The control processing method of claim 1, wherein the operating current transient is determined based on:
acquiring an instantaneous voltage value on a sampling resistor in the inverter module circuit at a preset sampling frequency, and calculating and determining the instantaneous value of the running current according to the instantaneous voltage value and the resistance value of the sampling resistor;
the preset sampling frequency is far greater than the operating current frequency of the inverter module circuit.
6. The control processing method according to claim 5, wherein the correcting an instantaneous value of an operating current of the inverter module circuit based on the ambient temperature data and the static pressure data, and taking the corrected current value as the actual current value includes:
and calculating a current effective value based on the preset sampling frequency and the running current instantaneous value, correcting the current effective value by utilizing a pre-constructed first function corresponding relation according to the environment temperature data and the static pressure data, and taking the corrected current value as the actual current value.
7. The control processing method according to claim 5, wherein the correcting an operating current instantaneous value of an inverter module circuit based on the ambient temperature data and the static pressure data, and taking the corrected current value as the actual current value includes:
and correcting the running current instantaneous value by utilizing a pre-constructed second function corresponding relation according to the preset sampling frequency, the environment temperature data and the static pressure data, and taking the corrected current value as the actual current value.
8. A control processing device of an air conditioner terminal device is characterized by comprising:
the acquisition module is used for acquiring the actual current value of an inverter module circuit of the fan coil when the fan coil runs;
the signal generation module is used for comparing and calculating the actual current value with a preset current protection value and correspondingly generating an indication signal according to different calculation results;
the control processing module is used for carrying out feedback control on the inverter module circuit according to the indication signal;
wherein the content of the first and second substances,
the actual current value of the inversion module circuit of the fan coil is obtained, and the method comprises the following steps:
acquiring environmental temperature data of an operating environment where the inverter module circuit is located in real time, and acquiring static pressure data of an outlet of a fan coil fan to which the inverter module circuit belongs in real time;
and correcting the operating current instantaneous value of the inverter module circuit based on the environment temperature data and the static pressure data, and taking the corrected current value as the actual current value.
9. An air conditioning apparatus, comprising,
a memory having an executable program stored thereon;
a processor for executing the executable program in the memory to implement the steps of the method of any one of claims 1-7.
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| CN213151927U (en) * | 2020-05-25 | 2021-05-07 | 苏州迈力电器有限公司 | High-voltage input vehicle-mounted off-grid inverter |
| CN112290685A (en) * | 2020-11-12 | 2021-01-29 | 杭州凯达电力建设有限公司自动化运维分公司 | Electric energy management integrated monitoring system |
| CN112453647A (en) * | 2020-11-23 | 2021-03-09 | 上海国龙仪器仪表有限公司 | Inverter energy storage welding machine controller with constant current control function |
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